This is IMHO the best 10x superzoom for m43 (as of 2017).
It won my personal challenge against the Olympus 14-150II and the Tamron 14-150.
The Panasonic 14-140 3.5-5.6 (so the Mk. II, Mk. I had a slightly slower aperture around 4.0-5.8 or so) is INCREDIBLE.
It has no single major annoyance; image quality is excellent to good under all conditions.
At the long end, things improve a little by stopping down from f/5.6 to f/8.0 or so, but this is it.
One minor annoyance is a fairly strong vignetting at the long end, which is not fully compensatable on my Olympus E-M10 Mk. I.
Besides this: The pictures come out very clean, sharp, and colorful.
This zoom lens, albeit being already several years on the market, it a top-performer.
It outperforms old-fashioned superzooms like the Canon APS-C 18-200mm BY FAR.
In fact, the Panasonic 14-140 is so good, that in terms of sharpness and picture quality there is no need to swap it for a prime like the m.zuikos (17 1.8, 25 1.8, 45 1.8, 12 2.0).
Of course, if you need more light, then the primes are the way to go. But under daylight, the Panasonic rocks.
This lens is almost glued to my E-M10. It is a perfect match and makes the ideal travel and day-to-day combo for me.
It won my personal challenge against the Olympus 14-150II and the Tamron 14-150.
The Panasonic 14-140 3.5-5.6 (so the Mk. II, Mk. I had a slightly slower aperture around 4.0-5.8 or so) is INCREDIBLE.
It has no single major annoyance; image quality is excellent to good under all conditions.
At the long end, things improve a little by stopping down from f/5.6 to f/8.0 or so, but this is it.
One minor annoyance is a fairly strong vignetting at the long end, which is not fully compensatable on my Olympus E-M10 Mk. I.
Besides this: The pictures come out very clean, sharp, and colorful.
This zoom lens, albeit being already several years on the market, it a top-performer.
It outperforms old-fashioned superzooms like the Canon APS-C 18-200mm BY FAR.
In fact, the Panasonic 14-140 is so good, that in terms of sharpness and picture quality there is no need to swap it for a prime like the m.zuikos (17 1.8, 25 1.8, 45 1.8, 12 2.0).
Of course, if you need more light, then the primes are the way to go. But under daylight, the Panasonic rocks.
This lens is almost glued to my E-M10. It is a perfect match and makes the ideal travel and day-to-day combo for me.